Photographic-film holder



Match 17, 1925.

A. P. DAVIS PHOTOGRAPH-I0 FILM HOLDER IN VEN TOR.

- ATTORNEYS.

Patented Mar. 17, 1925 ALBERT P. DAVIS, OF BINGHAMTON, NEW YORK.

PHOTOGRAPHIC-FIL1VI HOLDER.

Application filed May 21,

1 '0 aZZ whom it may camera:

Be it known that I, ALBERT P. DAVIS, a citizen of the United States, residing at Binghamton, in the county of Broome and State of New York, have invented certain new and useful Improvements in Photographic-Film Holders, of which the following .is a specification.

My invention relates to improvement in apparatus for developing, fixing, and washing photographic films. Its purpose is to enable more holders to be hung in the bath tank in a given space than now possible, in crease the capacity of the bath tank, simplify the holding parts of the apparatus and manufacture of the same, eliminating the use of screws, slots and solder, and to cause the surface of the films to be uniformly separated, regardless of the position of the holder, and to permit of easy positive adjustment of the film support to varying thickness of the base bar, due to shrinkage and swelling of the same, and to eliminate the multiple or bifurcated base board, a part of my device under my former patent, dated March 2d 1915, No. 1,130,152.

Vith these objects in View my invention consists of certain novel features of construction and arrangement of parts, as will be hereinafter more particularly described and pointed out in the claims; reference being had to the accompanying drawings, in which Fig. 1, is a perspective view of my device, and new form of film holder.

Fig. 2 shows my new film holder in a developing tank.

Fig. 3 is an end view of my device.

Fig. 4 is a perspective view of a fihn holding device.

The same reference characters denote like parts in each of the several figures of the drawings.

In carrying out my invention, I provide a support bar A, on which is slidably mounted or brought into position, the fixing supports B and B, one of which B, is held in fixed position and the other is adjustable and movable. These supports B and B are formed of a single piece of wire bent so as to form the two projecting arms V shaped, a and b and a and I) so as to form the connectors 2, 2 and 2, 2 for connecting the supports B and B to the bar A. The formation of the film supports holds the film in place, while reducing the amount of metal in place 1924. erial No. 714,815.

in actual contact with the film, also prevents the film from coming in contact with the sides of the tank, by holding it in diagonal alinenient with the support bar, and maintaining complete uniform separation between the film sides. Between the connectors 2. 2 and 2, 2, ,I have mounted the plate (Z, the ends of which are bent around the connectors 2, 2 and 2, 2 or joined in any other convenient method. As a further feature of my device, in the supports B and 3, I have the arms a and a crimped at E.

The supports B and B are mounted to position by sliding them along the bar A and may be disengaged from the bar A, and the distance between the two supports B and B may be varied at will, not only for the purpose of stretching the film taut, but also for adjustment for diiferent lengths of film. The fit of the base or support connectors 2, 2 on the bar A are such that the supports may be very slightly tiltable towards the support B or may he held in close adjustment for a purpose hereinafter explained. The support B after being moved along the bar or support A to its position, can be brought into close engagement, and held stationary, by inverting the support A and bending the ends 00, x of the connectors 2, 2 into close contact with the surface of A. Also by bending the bent ends 03, 02 towards each other, the space filled by the base bar or support is narrowed or lessened and by bending from each other said space is increased. By this means perfect contact with the base bar or support is maintained, under all atmosphe'ic conditions and any shrinking OI swelling of the base bar or support is compensated for. The support B is left in slidable and adjustable position along the bar A. I have found that when the ordinary film is slightly wetted at its ends, while the latter lie in overlapping contact with one another, and are held pressed together, the ends will adhere firmly, so that the film will retain after immersion the form of a closed band, which permits the finished film to be handled with very little trouble, or they may be pinned together. In order to bring suitable pressure upon the overlapping ends, I may provide a U shaped clasp or clip 4, which clip is resilient and may fit snugly upon the supports at E, and in this way bring suitable pressure upon the overlap- 2 these ends areinterposed between the arm a, of support B and the inner face of the clip 4, or they may be pinned together. In

using my improved film holder, the film 7 described. lVhenthe film C is sufficiently stretchech. itwill be found that. the film C has tilted slightly the support B so that the arm a. and connector Zbinds uponthe bar or support support B is automatically secured firmly in place. The inner sidesof the film C rest upon the crimp points at E, and areheld apart from contacting with. each other. The film holder is then inverted and placed in the developing tank D, in the developing solution contained therein, the ends of bar or film holder A resting upon the edge or rim portion of the tank D. Between the film ends which are held pressedby the clip at or pinned together and against the arm a of support- 13, and at. the crimped section E the solution enters in such amount as to Wet the film ends slightly and the latter Will be found to adhere firmly to each other. The film is immersed edgetvisein the developing solution, causing every part v of every film. to be actedfon uniformly and equally throughout ,the hole extent of its surface, andI any sediment or.v other foreign matter drops to the bottom of the tank. After sufficient development, the bar A is raised fromoff the tank D and thefilm immersed in the-fixing bath. From the fixing bath the film holder is moved toithe washing tank for thoroughcleansing. Bythe use of mynew filniholder, and by mounting the filinsupon the supports .13, Bavith the resultant absence of marring or tarnishing, an improved quality ofproduct results, the staining of ,the operator from the solution is avoided, the films subjected to even treatment, and are ready for printing.

I my nevvform of film holder, an increased numberof films may be mounted in ;the tank,i a nd treated in the shortest time, ,and passed to another operation. vAt the same time, the use of this film holder shortens the time of the operatorin the-,dark room. .By

A, and in this manner the the use of this film holder, the operator can immerse more film holders at one time in theimmersion tank, a greater number than larger yield of finished perfect films. The

device is durable and inexpensive in manufacture, and with little cost of upkeep and for repairs. The advantages of this new form offilm holder, over the film holder described in my patent. dated March: 2, 1915,

No. 1,130,152 are obvious. 7

Thus having described myinvention, What I claim as new and for wliich I desire Lett ers Patent is as follows: i

' 1 In a photographicfilm holder, comprising a base bar, a pair offilm holding supports, mounted by'slidingalong the base bar, to any desired distance,thesupports formed of one piece of Wire, bent into two V shaped'projecting arms, one of the arms of each support crimped in alinement, the ends of the arms bent over the rectangular base bar, the bends conforming to the side surfaces of the bar, and forming slidable connection; therewith, a tie strap mounted between. the bended ends, along one face of the bar, means forautomatically .locking the supports, at, anygiven point along the basebar. i 2. Ina photographic film. holder comprising a rectangular base bar, slidably' mounted on the same a pair of film holding supports, said supports formed of one piece of WlI'6,-b811t at the middle. and branching inV shaped formation, one of thebranches crimped inv outline, the ends of the branches bent around the sides of the bar, the bends inv alinement with .the sides, a strap mounted along one face of said bar,.connecting the bends in said arms, the arms of one support mounted in alinement withfone side of said bar, and-the arms of the other support in alinementwith the other side of said bar, the bent ends of one support crimped into the under surface of the bar, holding it in fixed position, the other support slidable upon the bar.

In testimonywhereof I have afiix ed my signature.

ALBERT r. DAVIS. 

